Security closure mechanism with knife means for releasing closure



Sept. 22, 1970 A N ET AL 3,529,750

SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASING CLOSURE .FiledOct. 9, 1968 6 Sheets-Sheet 1 INVENTOR S Aim FAQ Emm p44: .5 7-444;

BY W- 4% ATTORNEYS Sept. 22, 1970 M. BAUMANN ET AL 3,529,750

SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASING CLOSURE Filed001;. 9, 1968 6 Sheets-Sheet 2 g- 8 INVENTOR:

n/wrzaammw awfu'mz ATTORNEY-Y Sept. 22, 1970 M. BAUMANN ET AL 3,529,750

' SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASING CLOSUREFiled Oct. 9, 1968 6 Sheets-Sheet 3 9 9 Figl o Fig. /2 9 I Q a 73 Z4INVENTORY ATTORNEYJ' p 1970 M. BAUMANN ET AL.

SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASING CLOSURE 6Sheets-Sheet &

Filed Oct. 9. 1968 Fig. I5

'1' IIIIII F/E. I8

INVENTORJ A'TTORNEYJ Sept. 22, 1970 M. BAUMANN ET AL 3,529,750

SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASING CLOSURE FiledOct. 9, 1968 6 Sheets-Sheet 5 Fig. 16

7a 1 28 v J Fig. 17

IN VENT ORS Mmew MM {1cm- 1297,01

BY ew; ,JM

ATTORNEY).

Sept. 22, 1970 M..BAUMANN ETAL 3,529,750

SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASING CLOSURE FiledOct. 9, 1968 a Sheets-Sheet 6 /k\\\ I fi 4 fi C io E 6 7 a I \IQ U&\\'\\K 2 INVENTOR-r M442 0 Emu ,waw I742;

ATTORNEY! United States Patent Office 3,529,750 Patented Sept. 22, 19703,529,750 SECURITY CLOSURE MECHANISM WITH KNIFE MEANS FOR RELEASINGCLOSURE Manfred Baumann, Heerbrugg, and Alois Stiihli, Diepoldsau,Switzerland, assignors to Baumann AG, Diepoldsau, Switzerland, acorporation of Switzerland Filed Oct. 9, 1968, Ser. No. 766,146 Claimspriority, application Switzerland, Oct. 11, 1967, 14,225/67, 14,226/ 67Int. Cl. B67b 7/12 U.S. Cl. 222-80 21 Claims ABSTRACT OF THE DISCLOSUREThere is disclosed a security or safety closure mechanism for thematerial discharge opening of a container or the like. Such securityclosure mechanism comprises an insert member adapted to be secured tothe wall of the container, and a closure cover member secured to theinsert member. The insert member and the closure cover member arearranged in such a way that the closure cover member is rotatablyanchored at the insert member. One of these members is provided with atleast one knife means and, furthermore, one of such members possesses aweakened portion penetrated by such knife means in such a way that uponrotation of the closure cover member the weakened portion can besevered, whereby the closure cover member is detached from the insertmember.

BACKGROUND OF THE INVENTION The present invention broadly relates to animproved security or safety closure mechanism having filling connectionmeans for the material dispensing or discharge opening of a container orthe like, and in its more specific aspect, relates to a security closuremechanism incorporating an insert member secured in a wall of thecontainer and a closure cover member secured to the insert member.

It is especially important for the packaging of foodstuffs, luxuryconsumable items, cosmetic articles, chemical products and so forth,that the package container possess a material dispensing or dischargeopening which is equipped with a security closure mechanism whichprevents someone from opening the container for the first time withoutbeing detected. Such a security closure mechanism provides the guaranteethat upon the initial opening of the container the contents stillpossess the original quantity and the original quality.

There is already known to the art a security closure mechanism whichincorporates an insert member secured to the container wall and which isclosed by a membrane. A closure cover is located over this membrane.Upon initially opening the security closure it is necessary to use asuitable cutting instrument in order to remove the membrane. Oftentimes,such a cutting instrument, which is required for this type of securityclosure, is not readily available. Furthermore, the cutting operationrequires a certain dexterity in order to cleanly cut the membrane out ofthe insert member, so that generally it is not possible to carry out aproper pouring operation of the container contents.

SUMMARY OF THE INVENTION Accordingly, it is a primary object of thepresent invention to provide an improved security closure mechanism forthe material discharge opening of a container or the like whicheifectively overcomes the aforementioned drawbacks of the prior artstructures.

Another, more specific object of the present invention relates to animproved security closure mechanism which,

for instance, can be easily manufactured by injection moldingtechniques, which after having been opened provides a smooth materialdispensing opening, which does not require any additional instruments inorder to be opened, and wherein the closure mechanism after it has beeninitially opened, can be further used for at least closing thedispensing or discharge opening of the container.

Still a further object of the present invention is to provide animproved security closure mechanism which, in closed condition, onlyslightly protrudes out of the container or the like, and wherein thematerial discharge opening is constructed in such a fashion that thecontents of the container can be easily dispensed and without dripping,and wherein the material dispensing or pouring operation can beundertaken without being hindered by the container itself.

Now, in order to implement these and still further objects of theinvention, which will become more readily apparent as the descriptionproceeds, the inventive security closure mechanism is generallymanifested by the features that the insert member as well as the closurecover member each possess a respective substantially ring-shapedmarginal portion arranged about the axis of the closure opening andwhich are disposed in such a fashion with respect to one another thatthe closure cover member can be rotatably anchored at the insert member.Moreover, one of both members is provided with at least one knife meansat the region of the marginal portion which pierces a weakened portionof the other member such that upon rotating the closure cover member themarginal portion can be severed, and consequently, the closure covermember can be freed or released.

According to another aspect of the present invention, and for thepurpose of facilitating the pouring operation with regard to thecontainer contents, a pouring cylinder is arranged in the insert member.This pouring cylinder extends into the container during such time as theclosure mechanism is not yet opened, and furthermore, such pouringcylinder member is covered by the closure cover member. Upon release ofthe closure cover member this pouring cylinder member can be pulled outand mounted in its operational pouring position.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be betterunderstood, and objects other than those set forth above will becomeapparent, when consideration is given to the following detaileddescription thereof. Such description makes reference to the annexeddrawings wherein generally like reference numerals have been usedthroughout the various figures for similar or analogous components andwherein:

FIG. 1 is a sectional view of a first embodiment of inventive securityclosure mechanism as such is mounted at a container or the like;

FIG. 2 is a further embodiment of inventive security closure mechanism;

FIGS. 3, 4 and 5, are respective fragmentary sectional views ofdifferent arrangements for attaching the closure cover member with theinsert member of the inventive security closure mechanism, and whereinin each instance the knife means is operably connected with the closurecover member;

FIGS. 6, 7 and 8, also depict different fragmentary sectional views ofrespective modified versions of the security closure mechanism,specifically showing the arrangement of the knife means at the closurecover membet with respect to the insert member;

FIGS. 9, 10, 11 and 12, illustrate in fragmentary sectional view furthermodifications of the security closure mechanism, wherein in thisinstance the knife means is arranged at the respective insert member ofeach such figure, and further illustrates possible spatial arrangementsof such knife means with respect to the closure cover member and insertmember of each respective security closure mechanism;

FIG. 13 is a sectional view showing a detail of the weakened portion ofthe insert member or the closure cover member, and wherein such weakenedportion can be constituted by a plurality of thin rib members;

FIG. 14 is a fragmentary sectional view of a further type of securityclosure mechanism in which the material discharge opening at the insertmember is closed by a membrane having a weakened portion which ispierced by the knife means and includes a further portion for receivingsuch knife means;

FIG. 15 depicts the security closure mechanism of FIG. 1 wherein theclosure cover member is rotatably connected with the container by meansof a loop or the like;

FIG. 16 shows a security closure mechanism of the type shown in FIG. 14which is covered by a protective cover member secured at a loop member;

FIG. 17 depicts in sectional view a further type of security closuremechanism having a pouring cylinder, wherein the right-hand portion ofsuch figure depicts the closure mechanism in its closed position and theleft-hand portion illustrates the pouring cylinder in its operationalpouring position after the closure mechanism has been opened;

FIG. 18 shows in sectional view another type of security closuremechanism incorporating a pouring cylinder and in a condition where thesecurity closure mechanism has not yet been opened; and

FIG. 19 finally shows a further modification of inventive securityclosure mechanism utilizing a pouring cylinder, wherein the right-handportion of such figure shows the pouring cylinder in a position when theclosure mechanism has not yet been opened, and the left-hand portionshows such pouring cylinder in the position it would as sume after theclosure mechanism is opened and the pouring cylinder is arranged tocarry out the pouring operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Describing now the drawings, inFIG. 1 the front end cover or wall 1 of a container 100' or the like hasbeen shown. An opening 1a is provided at the container cover or wall 1,and the marginal edge 2 providing such opening 1a is inwardly flexed orbent, as shown. An insert member 3 is introduced into this opening 1a.This insert member 3 snugly fits in the opening 1a formed by the bentmarginal edge 2. By virtue of this arrangement, the insert member 3 ispositively retained, and thus, can no longer become loosened. The flexedmarginal edge 2 is capable of faultlessly retaining the insert member 3,particularly if such insert member 3 is formed of a suitable plastic.

At the side of the insert member 3 facing away from the marginal edge 2such insert member 3 incorporates a cylindrical portion 4 which mergesinto a rather sharp edge or border 5 serving as the pouring means.Continuing, it will be also seen that a marginal portion 6 is formedbetween the insert member 3 and the cylindrical portion 4 thereof. Thismarginal portion 6 incorporates a substantially ring-shaped portion 7 oflesser Wall thickness as well as a substantially collar-shaped marginalhead or flange 8.

Furthermore, there is provided a closure cover member 9 consisting of aninner cylindrical portion 10 which fits into the cylindrical portion 4of the insert member 3 and which forms the actual closure cover. Theouter cylindrical portion 11 of this closure cover member 9, whichadvantageously can possess a quadrangular or square configuration inorder to improve the gripping action, possesses at its lower edge amarginal bead or flange 12 which runs out into a point or taper whichengages beneath the collar-shaped marginal bead portion 8 and is fixedlyretained in this position.

Additionally, it should be understood that at the under side of themarginal head portion 12- there are formed a number of knife means 13,for instance, two such knife means, which, upon mounting of the closurecover member 9 piercingly extend through the weakened or relatively thinring-shaped portion 7 at the region of the peripheral edge of the insertmember 3. If the closure cover member is mounted in the illustratedmanner, then the safety closure mechanism can only be opened by rotatingthe closure cover member 9. Upon rotation of this closure cover member9, the knife means 13 cut away from the marginal edge or portion 6 theouter part having the substantially collar-shaped marginal head orflange 8. When this marginal portion 6 has been completely cut away,then, the closure cover member 9 can be removed without difliculty.During further use the sealing action which is desired is attained bythe cylindrical portion 10 of the closure cover member 9.

Turning attention now to FIG. 2, here there is shown a furtherembodiment of inventive safety or security closure mechanism. The coveror end wall 1 of the container likewise possesses an opening 1a definedby the marginal edge 2. However, in contrast to the arrangement of FIG.1, in this embodiment the marginal edge 2 is upwardly flexed.Furthermore, surrounding the edge 2 is a submerged or recessed portion14 which is provided at the container wall or cover 1. In this instance,the insert member 3 consists of a cylindrical portion 3a at which thereis formed a flange 15. The cylindrical portion 3a of the insert member 3engages with the opening 1a of the container cover or wall 1 and isfixedly retained by the edge or apex 2a existing between the marginaledge 2 and the submerged cover portion 14. Furthermore, theaforementioned flange 15 possesses a substantially ring-shaped portion17 possessing a smaller wall thickness than the remainder of suchflange.

The closure cover member is mounted in the cylindrical portion 3a of theinsert member 3. A flange member 19 is formed at the actual closureportion of the closure cover member 18. This flange member 19 has itsmarginal edge provided with ribbed projections 20. At the underside ofthe flange member 19 there is a substantially hook-shaped annular beadportion or border 21 which engages about the flange portion 15 of theinsert member 3, as shown. Once again, at the underside of the flangeportion 19 there are formed a number of knife means 13. In the closed orlocked condition of the security closure member, as it is shown in FIG.2, these knife means 13 piercingly extend through the substantiallyring-shaped portion 17 of less thickness and pro vided at the insertmember 3.

Again, it should be apparent that the closure cover member 18 can onlybe removed by rotation. During the rotational movement the knife means13 cut away a portion of the flange 15, whereafter the closure covermember 18 can be withdrawn out of the insert member 3. It is herementioned that not only for this embodiment, but for all of theembodiments disclosed herein, an injection moldable plastic has found tobe particularly suitable as the material for forming the securityclosure mechanism. In so doing, the closure cover member with the knifemeans can be advantageously manufactured from a harder material thanthat of the insert member. Still, this is not absolutely necessary sincethe sharp form of the knife means 13 is suflicient to cut away themarginal bead or flange of the insert member. In order to mount theclosure cover member 18 the elastic deformability of the marginal regionof this closure cover member is utilized to advantage. The movement inthe opposite direction, however, is prevented by the appropriatelyformed portions of the insert member 3. Consequently, there is providedan absolutely reliable closure mechanism, wherein opening thereof can beachieved by a simple rotational movement.

Referring now to FIGS. 3 to 15, inclusive, wherein like referencenumerals have generally been employed for similar or analogouscomponents, and where there is shown various modified forms of theinventive safety closure mechanism, it will be seen that in the versionshown in FIG. 3 the safety closure mechanism again incorporates thecover closure member 9 and the insert member 3. Additionally, it will berecognized that the closure cover member 9 is provided with knife means13 at the region of the marginal beaded portion or border 12 whichpiercingly extend through a weakened portion 312 of the insert member 3.Furthermore, it will be recognized that the marginal ring-shaped portion12 is located beneath a marginal ring-shaped portion 8 of the insertmember 3. Furthermore, the knife means 13 extend substantially parallelto the axis of the container or the material dispensing opening and in adirection toward the container.

In FIG. 4, the knife means 13 is likewise provided at the closure covermember 9, again piercingly extending through a weakened portion 31; ofthe insert member 3 and located near the marginal beaded portion orborder 8 which is situated above the marginal portion 12 of the closurecover member 9. Once again, the knife means 13 extend substantiallyparallel to the axis of the container.

FIG. 5 also shows a closure cover member 9 provided with the annular orring-shaped marginal portion 12 located beneath the ring-shaped marginalportion 8 of the insert member 3. Again, this cover member 9 has knifemeans 13 which piercingly engage with the weakened portion 3b of theinsert member 3 and extending substantially parallel to the lengthwiseaxis of the container and in the direction of such container.

FIG. 6 shows a security closure mechanism wherein the knife means 13,while extending substantially parallel to the axis of the container, inthis instance is directed away from the container.

On the other hand, in FIG. 7 the knife means 13 provided at the closurecover member 9 extend radially outwardly of the container and piercinglycontact the weakened portion 3b of the insert member 3 which is arrangedadjacent the substantially ring-shaped marginal bead or flange 8thereof.

FIG. 8 is somewhat similar to the arrangement of FIG. 7, but in thiscase the knife means 13 at the closure cover member 9 extend radiallyinwardly in a direction toward the longitudinal axis of the container.

FIGS. 9 to 12 inclusive show various types of security closuremechanisms wherein the knife means 13 are, in this instance, provided atthe insert member 3 as opposed to the closure cover member 9. In FIGS. 9and 10 the knife means 13 extend substantially parallel to the axis ofthe container or its material discharge opening and in a direction awayfrom the container. On the other hand, in FIGS. 11 and 12, the knifemeans 13 extend radially with regard to the axis of the container, andspecifically, in FIG. 11, such knife means 13 extends radially inwardlytoward the inside of the container and in FIG. 12 radially outwardly ofthe container.

FIG. 13 shows a detail of the weakened portion of the insert member orthe closure cover member, and specifically, wherein such weakenedportion is constituted by a plurality of thin rib members 22.

FIG. 14 shows a modified form of security closure member wherein thematerial dispensing opening at the insert member 3 is closed by amembrane or thin-skinned diaphragm 23. This membrane 23 embodies aweakened portion 24 which is located at the region of the knife means 13in order to be pierced by the latter, and such weakened portion 24incorporates a portion 25 of U- shaped or cup-shaped configuration whichis capable of accommodating or receiving the knife means 13.

FIG. 15 shows the security closure mechanism of FIG. 1 wherein theclosure cover member 9 is connected by a loop member 26 rotatably withthe container.

On the other hand, FIG. 16 shows a security closure mechanism of thetype shown in FIG. 14 wherein such closure mechanism is cover by aprotective cover 27 secured at a loop member 26.

Turning attention now to the embodiment of security closure mechanismshown in FIG. 17, again it will be recognized that the container endwall or cover portion is designated by reference numeral 1 and has anopening 1a which is formed by an upwardly directed edge portion -2. Thecontainer cover or wall 1 is additionally formed so that it is directedinwardly so that the closure mechanism protrudes as little as possibleabove the contour of the container. An insert member 3 is fixedlyintroduced into the opening 1a formed by the edge portion 2. This insertmember 3 is fixedly retained by the edge or corner 2a defined by theintersection of the edge portion 2 and the container wall or coverportion 1. Furthermore, it will be recognized that the insert member 3is equipped at its inner cylindrical portion with a number of cams orprojections 28. A pouring cylinder member 29 is located within theinsert member 3, and this pouring cylinder member has a number of camsor projections 30. In the position of the components where the securityclosure mechanism has not been opened, as shown at the righthand portionof FIG. 17, the cams 30 of the pouring cylinder member 29 bear upon thecams 28 of the insert member 3. The closure mechanism is sealed orclosed by the closure cover member 18. The latter has a flange member 19possessing a substantially hook-shaped edge or marginal region 21 bymeans of which there is engaged the marginal regional border 31 of theinsert member 3 which possesses a ring-shaped portion of lesser wallthickness, as shown. At the underside of the flange member 19 there arearranged knife means 13 which piercingly extend through the ring-shapedportion of lesser wall thickness of the edge or marginal region 31 andthereby fix the position of the closure cover member 18.

Now, in order to open the security closure mechanism the closure covermember 18 is rotated at the ribs 20 arranged at the flange 19, until theknife means 13 sever the outer portion of the edge 31 from the remainingportion of the insert member 3. Thereafter, the closure cover member 18can be conveniently and easily lifted away. In order to provide for aproper pouring operation, the pouring cylinder member 29 is rotatedthrough in other words is placed in an inverted position, and againintroduced into the insert member 3, as shown as the lefthand portion ofFIG. 17. In this position, the cams 30 of such pouring cylinder member29 are guided between the intermediate spaces between the cams 28 of theinsert member 3, until a locking action is perfected by means of thecams 28, 30. In other words, these cams 28 and 30 form a bayonet type oflock by means of which the pouring cylinder member 29, by rotation, canbe brought into fixed connection with the insert member 3, as shown.Now, the edge of the pouring cylinder member 29 is located at asufficient spacing from the edge of the'container itself, so that afaultless pouring operation is possible. Furthermore, by means of theclosure cover member 18, it is possible to seal the container eventhough the pouring cylinder member has assumed its operationl pouringposition, and although the container itself can no longer be absolutelysealed from the standpoint of insuring that it has never been opened.

In FIG. 18 there is a further embodiment of security closure mechanismwhich incorporates a container cover or wall 1 having an opening formedby the marginal edge portion 2. An insert member 3 is introduced intight sealing fashion into this opening 1a. This insert member 3incorporates at its inner surface a cylindrical portion 32 as well as amerging portion having threading 33. Again,

there is provided a pouring cylinder member 29 which embodies a collar34, at one side of which there is provided the threading 35 and at theother side thereof a cylindrical portion 36. The closure cover member 18is constructed in the same manner as considered with regard to theembodiment of FIG. 17, and similarly, the secure attachment of suchclosure cover member 18 to the insert body member 3 is carried out inthe manner of the previous embodiment. After opening the securityclosure mechanism the pouring cylinder member 29 is again rotatedthrough 180 into an inverted position and reintroduced into the insertmember 3 and threaded with the threading 33 thereof. Just as in theprevious embodiment, here also the edge of the pouring cylinder member29 protrudes suificiently far out of the contour of the container sothat a faultless and unobstructed pouring of the container contents ispossible.

FIG. 19 likewise shows an embodiment of security closure mechanismhaving filling connection means. More precisely, it will be recognizedthat at the container cover or end wall 1 there is provided an opening1a which is formed by the flexed marginal edge 2. An insert member 3 isintroduced into this opening 1a and is held by the edge 2 of suchopening. Insert member 3 incorporates a recessed or stepped cylindricalinternal portion 60 within which the pouring cylinder member 29 can beguided in lengthwise direction. The pouring cylinder 29 in turn has atits pouring edge 37 a collar 38 or equivalent structure, by means ofwhich it braces or supports itself upon a shoulder 39 provided at theinsert member 3. This pouring cylinder member 29 possesses a furthercollar 40 and at the end opposite the pouring edge a marginal portion41. Collars 38 and 40 need not be formed as ringlike members, rathercould also be constructed in the form of a plurality of cams.

Once again, the closure cover member 18 is constructed in the samemanner as in the embodiments of FIGS. 17 and 18. Now, in order to openthe security closure mechanism, the closure cover member 18 is againrotated until the safety seal arrangement is released. Thereafter, thepouring cylinder member 29 is retracted to such an extent until thecollar 40 engages with the shoulder 39, as shown at the left-handportion of FIG. 19. Since both the pouring cylinder member '29 as wellas the insert member 3 are formed to be resilient or elasticallyflexible, the transition of the pouring cylinder member into itsoperational pouring position can be undertaken without difliculty, butthe pouring cylinder member itself can no longer be loosened or releasedby virture of the provision of the collar 40 and the marginal edge orend 41 provided at the pouring cylinder member. The container can alsoagain be sealed, although not safety sealed, in this position of thepouring cylinder member by using the closure cover member It should beapparent from the foregoing detailed description, that the objects setforth at the outset to the specification have been successfullyachieved.

Accordingly, what is claimed is:

1. A security closure mechanism for the material dis charge opening of acontainer, comprising an insert member adapted to be secured in a wallof the container, a closure cover member secured to said insert member,said insert member and said closure cover member each being providedwith a respective substantially ring-shaped marginal portion meansdisposed concentrically about the axis of said discharge opening andbeing arranged in such a way with respect to one another that saidclosure cover member is rotatably anchored at said insert member, one ofsaid members being provided with at least one knife means at the regionof its marginal portion means, the other of said members having aweakened portion disposed concentrically about the axis of saiddischarge opening and penetrated by said knife means such that uponrotation of said closure cover member said marginal portion means isseparated and releases said closure cover member from said insertmember.

2. A security closure mechanism as defined in claim 1, wherein saidclosure cover member has a marginal portion which engages about amarginal portion of said insert member.

3. A security closure mechanism as defined in claim 1, wherein saidweakened portion comprises a thin membrane.

4. A security closure mechanism as defined in claim 1, wherein saidweakened portion comprises a plurality of thin rib members which connectsaid marginal portion means with its associated member.

5. A security closure mechanism as defined in claim 1, wherein saidknife means constitutes a portion of said closure cover member.

6. A security closure mechanism for the material discharge opening of acontainer, comprising an insert member adapted to be secured in a wallof the container, a closure cover member secured to said insert member,said insert member and said closure cover member each being providedwith a respective substantially ring-shaped marginal portion meansarranged in such a way with respect to one another that said closurecover member is rotatably anchored at said insert member, one of saidmembers being provided with at least one knife means at the region ofits marginal portion means, the other of said members having a weakenedportion penetrated by said knife means such that upon rotation of saidclosure cover member said marginal portion means is separated andreleases said closurecover member from said insert member, and whereinsaid knife means constitutes a portion of said insert member.

7. A security closure mechanism as defined in claim 1, wherein saidknife means extends substantially parallel to the axis of said materialdischarge opening and is directed toward the container when the securityclosure mechanism is mounted thereat.

8. A security closure mechanism for the material discharge opening of acontainer, comprising an insert member adapted to be secured in a wallof the container, a closure cover member secured to said insert member,said insert member and said closure cover member each being providedwith a respective substantially ring-shaped marginal portion meansarranged in such a way with respect to one another that said closurecover member is rotatably anchored at said insert member, one of saidmembers being provided with at least one knife means at the region ofits marginal portion means, the other of said members having a weakenedportion penetrated by said knife means such that upon rotation of saidclosure cover member said marginal portion means is separated andreleases said closure cover member from said insert member, and whereinsaid knife means extends substantially parallel to the axis of saidmaterial discharge opening and extends away from said container whensaid security closure mechanism is mounted thereat.

9. A security closure mechanism as defined in claim 1, wherein saidknife means is directed substantially radially toward the outside.

10. A security closure mechanism as defined in claim 1, wherein saidknife means is directed substantially radial ly toward the inside.

11. A security closure mechanism for the material discharge opening of acontainer, comprising an insert mem ber adapted to be secured in a wallof the container, a closure cover member secured to said insert member,said insert member and said closure cover member each being providedwith a respective substantially ring-shaped marginal portion meansarranged in such a way with respect to one another that said closurecover member is rotatably anchored at said insert member, one of saidmem bers being provided with at least one knife means at the region ofits marginal portion means, the other of said members having a weakenedportion penetrated by said knife means such that upon rotation of saidclosure cover member said marginal portion means is separated andreleases said closure cover member from said insert member, and furtherincluding a pouring cylinder member arranged in said insert member, saidpouring cylinder member extending into the container when said securityclosure mechanism is not yet opened, said closure cover member coveringsaid pouring cylinder member, said pouring cylinder member beingretractable out of said insert member upon opening of said securityclosure mechanism.

12. A security closure mechanism for the material discharge opening of acontainer, comprising an insert member adapted to be secured in a wallof the container, a closure cover member secured to said insert member,said insert member and said closure cover member each being providedwith a respective substantially ring-shaped marginal portion meansarranged in such a way with respect to one another that said closurecover member is rotatably anchored at said insert member, a portion ofsaid closure cover member being provided with at least one knife meansat the region of its marginal portion means, the other of said membershaving a weakened portion penetrated by said knife means such that uponrotation of said closure cover member said marginal portion means isseparated and releases said closure cover member from said insertmember, and further including a pouring cylinder member disposed in saidinsert member, said pouring cylinder member and said insert member,being provided with cooperating means which enable said pouring cylindermember to be rotated through substantially 180 from its position wheresaid pouring cylinder member is arranged in said insert member when saidsecurity closure mechanism is closed, whereby said cooperating meansenable said pouring cylinder member to be fixedly connected in thisrotated position with said insert member.

13. A security closure mechanism as defined in claim 12, wherein saidcooperating means provide a bayonet connection for fixedly connectingsaid pouring cylinder member in its operable position with said insertmember.

14. A security closure mechanism as defined in claim 12, wherein saidcooperating means comprise a respective threaded portion provided atsaid pouring cylinder member and at said insert member, so that both ofsaid lastmentioned members can be threadably connected with one anotherto permit said pouring cylinder member to assume an operational pouringposition.

15. A security closure mechanism as defined in claim 5, furtherincluding a pouring cylinder member arranged at said insert member, saidpouring cylinder member being movable into an operational pouringposition by withdrawing said pouring cylinder member until it reaches aterminal position, and cooperating means provided at said pouringcylinder member and said insert member which enable said pouringcylinder member to be rigidly connected in this terminal position withsaid insert member.

16. A security closure mechanism as defined in claim 15, wherein saidcooperating means define a non-releasable connection for said pouringcylinder member with said insert member when said pouring cylindermember assumes its operational pouring position.

17. A security closure mechanism as defined in claim 5, wherein saidsecurity closure mechanism is formed of an injection moldable plastic.

18. A security closure mechanism as defined in claim 5, wherein saidclosure cover member and said insert member are formed of respectivematerials possessing different hardness.

19. A security closure mechanism as defined in claim 5, wherein saidclosure cover member after opening the security closure mechanism canagain be inserted into said insert member in container sealing fashion.

20. A security closure mechanism as defined in claim 1 wherein saidweakened portion extends radially from the axis of said dischargeopening.

21. A security closure mechanism as defined in claim 1, wherein saidweakened portion extends parallel to the axis of said discharge opening.

References Cited UNITED STATES PATENTS 3,227,317 l/ 1966 Bereziat et al22283 3,379,333 4/1968 Navia 222541 X 3,429,481 2/ 1969 Navia 2228.3

STANLEY TOLLBERG, Primary Examiner US. Cl. X.R.

